title: Oxypnictide SmFeAs(O,F) superconductor: a candidate for high-field magnet applications.
abstract: The recently discovered oxypnictide superconductor SmFeAs(O,F) is the most attractive material among the Fe-based superconductors due to its highest transition temperature of 56 K and potential for high-field performance. In order to exploit this new material for superconducting applications, the knowledge and understanding of its electro-magnetic properties are needed. Recent success in fabricating epitaxial SmFeAs(O,F) thin films opens a great opportunity to explore their transport properties. Here we report on a high critical current density of over 10(5) A/cm(2) at 45 T and 4.2 K for both main field orientations, feature favourable for high-field magnet applications. Additionally, by investigating the pinning properties, we observed a dimensional crossover between the superconducting coherence length and the FeAs interlayer distance at 30-40 K, indicative of a possible intrinsic Josephson junction in SmFeAs(O,F) at low temperatures that can be employed in electronics applications such as a terahertz radiation source and a superconducting Qubit.
authors.affiliation: Institute for Metallic Materials, IFW Dresden, 01171 Dresden, Germany. k.iida@ifwdresden.de
authors.forename: Kazumasa
authors.initials: K
authors.lastname: Iida
authors.forename: Jens
authors.initials: J
authors.lastname: Hänisch
authors.forename: Chiara
authors.initials: C
authors.lastname: Tarantini
authors.forename: Fritz
authors.initials: F
authors.lastname: Kurth
authors.forename: Jan
authors.initials: J
authors.lastname: Jaroszynski
authors.forename: Shinya
authors.initials: S
authors.lastname: Ueda
authors.forename: Michio
authors.initials: M
authors.lastname: Naito
authors.forename: Ataru
authors.initials: A
authors.lastname: Ichinose
authors.forename: Ichiro
authors.initials: I
authors.lastname: Tsukada
authors.forename: Elke
authors.initials: E
authors.lastname: Reich
authors.forename: Vadim
authors.initials: V
authors.lastname: Grinenko
authors.forename: Ludwig
authors.initials: L
authors.lastname: Schultz
authors.forename: Bernhard
authors.initials: B
authors.lastname: Holzapfel